Samsung B2700 - Manual (Page 56)

a
troubleshooting
If you are having trouble with your mobile phone, try these troubleshooting procedures before contacting a service
professional.
While you turn on your phone, the following
messages may appear:
Message Try this to solve the problem:
Insert SIM
card Ensure that the SIM or USIM card is
installed correctly.
Phone lock
When the phone lock feature is
enabled, you must enter the
password you set for the phone.
PIN lock
When using the phone for the first
time or when the PIN requirement is
enabled, you must enter the PIN
supplied with the SIM or USIM card.
You can disable this feature by using
the
PIN lock menu.
PUK lock
Your SIM or USIM card is blocked,
usually as a result of entering your
PIN incorrectly several times. You
must enter the PUK supplied by your
service provider.
Message Try this to solve the problem: